The GMass Insider’s Guide
Everything we know about GMass in one document: what it costs, its grades, getting a refund, getting help and what else to look at. Read it here, or keep a copy.
GMass
The Insider’s Guide
Mail merge and cold email campaigns sent from inside Gmail
Every plan, grade, refund rule and rival among cold outreach tools, read from GMass’s own pages.
Made by GMass, Inc. · checked Oct 17, 2026 · toolgpa.com
Contents
- 01WelcomeWhat it is, who it suits, its grades and the ten things to know first
- 02What it costsEvery plan, the free plan, ways to pay less and how prices have moved
- 03What it doesIts main features, where it runs, what it works with and who makes it
- 04Where it standsIts grades against its category, and whether to keep it or make your own
- 05The alternativesThe tools it is most often weighed against, side by side
- 06Quick answersThe questions people ask about it, each answered in a line or two
- 07About ToolGPAWho made this guide, what else is on the site, and how to cite it
ToolGPA put this guide together from GMass’s own pages, its app-store listings and our grades. Every fact in it is on GMass’s page too, where it is kept up to date. Checked Oct 17, 2026.
Part 01 · Overview
Welcome
What it is, who it suits, its grades and the ten things to know first
2.4
GPA, above 11 of the 20 other cold outreach tools we grade
GMass is a Chrome extension that adds mass email to Gmail: campaigns are written in Gmail's compose window, personalized from a list or Google Sheet, and sent from your own account with automatic follow-ups that stop on a reply. Larger sends can rotate across several inboxes or go out through an SMTP server, and a web dashboard holds campaign reports and settings.
To get you started, here are 9 things to know about GMass, taken from its own pages and our grades.
It's Gmail and Chrome only, though, and follow-ups need Premium.
- 1
Best for cold email without leaving Gmail
It's about the easiest start in this category.
- 2
Paid plans start at $20 a month
As its pricing page puts it: $20 per account / month, billed annually ($29.95 billed monthly).
- 3
You can try it first
7-day free trial limited to 50 emails per 24 hours, no credit card required
- 4
It runs on Web
Web, with a browser extension too.
- 5
Campaigns from the Gmail compose window
Write a campaign as an ordinary Gmail message, address it to a list, label or Google Sheet, and send it with the GMass button from your own account.
- 6
Automatic follow-ups
Unlimited follow-up stages that stop when a contact replies, clicks or opens, sent in the same thread or as new ones. Needs Premium or above.
- 7
Google Sheets campaigns
Merge fields come from a Google Sheet, GMass picks up edits made before a scheduled send, and new rows can be emailed automatically.
- 8
A 2.4 GPA, above 11 of 20
That is against the other cold outreach tools we grade, on value, the free plan, features, ease of use and platforms.
- 9
Keep it
To replace GMass you would be making newsletters sent to thousands of people that still reach the inbox. That is not a weekend's work, with an AI app builder or without one.
GMass at a glance
- Pricing
- Free trial, from $20 per account / month, billed annually ($29.95 billed monthly)
- Free plan
- No
- Free trial
- 7-day free trial limited to 50 emails per 24 hours, no credit card required
- Runs on
- Web, Browser extension
- Made by
- GMass, Inc.
- Category
- Cold Outreach
- Our grade
- 2.4 GPA, fair
The report card
Best for cold email without leaving Gmail
GMass turns Gmail into a cold email tool: write the campaign in the normal compose window, point it at a Google Sheet and it sends from your own account, following up until people reply. It's about the easiest start in this category. It's Gmail and Chrome only, though, and follow-ups need Premium.
| Subject | Grade | Comment |
|---|---|---|
| Value for money | B | Five people on the Team plan pay $145 a month billed annually for every feature, $29 a head, or $175 billed monthly. That's inside the cheaper quarter's $32.50. A solo sender who wants follow-ups needs Premium at $29 an account billed annually. |
| Free plan and trial | C | No free plan. The 7-day trial needs no card but is capped at 50 emails a day, enough to check it works in your Gmail. |
| Features | C | The email job done fully from Gmail: unlimited emails and contacts, mail merge from Sheets, follow-ups that stop on a reply, A/B tests, inbox rotation and SMTP for big sends. It's a smaller job, though: no LinkedIn steps, and Standard has no follow-ups. |
| Ease of use | B | No App Store rating on record, but it lives inside the Gmail you already use: write an email, pick a list or a Sheet and press the GMass button. Very little to learn. |
| Platforms and integrations | C | It needs Gmail or Google Workspace and the Chrome browser, so it's a computer-only tool. Google Sheets and Zapier connect, and there's an API from Premium. |
An A is worth 4 points, a B 3, a C 2, a D 1 and an F nothing. The GPA is the average of the five.
Who GMass is for
- Great if you want to send campaigns without leaving Gmail
- Handy when your list lives in a Google Sheet that keeps changing
- Good for solo senders who want follow-ups but not another app
Who it is not for
- Not for you if you use Outlook or another mail service, as it's Gmail only
- Skip it if you want LinkedIn steps, which GMass doesn't do
- Tight if you're on Standard, which has no automatic follow-ups
Good to know
Good for
- People who want to send cold email without leaving Gmail
- Mail merges from a Google Sheet, including recurring sends
- Solo senders who need follow-ups but not a separate outreach app
Worth knowing
- Needs a Gmail or Google Workspace account and the Chrome browser; campaigns are written and sent from inside Gmail.
- Each subscription covers one Gmail account, and the Standard plan has no automatic follow-ups.
- Inbox rotation needs Professional or a Team plan; sending through GMass's own SMTP service costs $5 per 10,000 messages.
- Gmail's own daily sending limits still apply to anything sent through the Gmail account itself.
Part 02 · Pricing
What it costs
Every plan, the free plan, ways to pay less and how prices have moved
$20
A month to start
GMass is a paid product with a free trial, starting at $20 per account / month, billed annually ($29.95 billed monthly).
Standard
$20
per account / month, billed annually ($29.95 billed monthly)
Unlimited emails, contacts and campaigns, mail merge, email verification and Spam Solver. No automatic follow-ups. $249 a year.
Premium
$29
per account / month, billed annually ($39.95 billed monthly)
Adds sequences and automatic follow-ups, A/B testing, triggered emails, and the API and Zapier. $349 a year.
Professional
$49
per account / month, billed annually ($59.95 billed monthly)
Adds inbox rotation across several sending accounts (MultiSend) and high-priority support. $599 a year.
Team
$145
per month for up to 5 users, billed annually ($175 billed monthly)
Every feature, including inbox rotation, for 5 Gmail accounts. Packs of 10, 25, 50 and 100 users cost less per user.
Trying it first
7-day free trial limited to 50 emails per 24 hours, no credit card required
Read from gmass.co on Oct 17, 2026.
Ways to pay less
Annual discount
Save up to 31% with annual billing
Standard costs $249 a year against $29.95 a month billed monthly, a saving of about 31%; Premium saves about 27% and Professional about 17%.
Stated on gmass.coEducation
15% off for .edu Google Workspace accounts
GMass's pricing FAQ says Google Workspace users on a .edu domain get 15% off the published prices, applied automatically after subscribing.
Stated on gmass.coNonprofit
15% off for .org Google Workspace accounts
The same 15% discount applies automatically to Google Workspace accounts on a .org domain; nonprofits on other domains do not get it.
Stated on gmass.co
Part 03 · Features
What it does
Its main features, where it runs, what it works with and who makes it
2
Places it runs: Web and Browser extension
Mail merge and cold email campaigns sent from inside Gmail. Here is what it does, as its own site describes it, and what it covers: public API, AI features, email campaigns.
It's a smaller job, though: no LinkedIn steps, and Standard has no follow-ups.
- Campaigns from the Gmail compose window
- Write a campaign as an ordinary Gmail message, address it to a list, label or Google Sheet, and send it with the GMass button from your own account.
- Automatic follow-ups
- Unlimited follow-up stages that stop when a contact replies, clicks or opens, sent in the same thread or as new ones. Needs Premium or above.
- Google Sheets campaigns
- Merge fields come from a Google Sheet, GMass picks up edits made before a scheduled send, and new rows can be emailed automatically.
- Inbox rotation and SMTP
- MultiSend spreads one campaign across several mailboxes on Professional and Team, and an SMTP server can carry sends larger than Gmail allows.
- Reports in Gmail, the dashboard and the web
- Opens, clicks, replies, bounces and blocks arrive as Gmail reports, in the dashboard and as shareable web reports, with an AI Deep Analysis of the results.
- AI writing and SpinMax
- AI can draft a full campaign with its follow-ups, and SpinMax varies the wording of every email in a campaign automatically.
Where it runs
- Web
- Browser extension
What it works with
- Gmail
- Google Sheets
- Zapier
GMass is made by GMass, Inc.
Part 04 · Standing
Where it stands
Its grades against its category, and whether to keep it or make your own
11/20
Other cold outreach tools it is graded above
GMass's GPA of 2.4 is higher than 11 of the 20 other cold outreach tools we grade, and level with 1.
It stands best on ease of use (B, above 17 of 20) and worst on features (C, above 0).
Its paid plans start at $20 a month, against a middle price of $38.80 for the category: 1 of the 17 others that charge start lower.
On features, ease of use and platforms it scores 2.3 out of 4. Nothing scores higher for less, though at least one tool matches that score at a lower price.
Each grade against the category
Every bar is all 21 cold outreach tools we grade, cut by the letter each got. GMass’s own letter is outlined.
- BValue for moneyAbove 11 of 20
- CFree plan and trialAbove 5 of 20
- CFeaturesAbove 0 of 20
- BEase of useAbove 17 of 20
- CPlatforms and integrationsAbove 0 of 20
Price against what you get
Each dot is one of 18 cold outreach tools. Further left costs less; higher up scores better on features, ease of use and platforms. GMass is the marked dot.
What paid plans start at, a month (each step along is roughly double) →
Keep it, or make your own?
Whether this is something you could build for yourself with an AI app builder, and what you would give up.
Keep it
To replace GMass you would be making newsletters sent to thousands of people that still reach the inbox. That is not a weekend's work, with an AI app builder or without one.
It costs $240 a year.
What you could not
- Newsletters sent to thousands of people that still reach the inbox.
- It plugs into other products, Gmail, Google Sheets and Zapier among them, and has an API.
- AI features, unless you pay a model provider for each request yourself.
What this rests on. GMass’s listing: what it does, where it runs, what it plugs into and what it costs. It is a judgement about the kind of software this is. We have not built a replacement for it, and making your own means looking after it too. How we decide, and every tool’s verdict.
Part 05 · Alternatives
The alternatives
The tools it is most often weighed against, side by side
Mixmax, Yesware, Mailshake, Saleshandy and Instantly
The 5 tools GMass is most often weighed against, with where each one differs from it.
- 2.2GPA
Mixmax
Free plan · from $29/mo
Email sequences, tracking and meeting booking inside Gmail.
- Mixmax has a free plan. GMass does not, though it has a free trial.
- Mixmax also covers templates and booking links.
- 2.2GPA
Yesware
Free plan · from $15/mo
Email tracking and outreach campaigns inside Gmail and Outlook.
- Yesware has a free plan. GMass does not, though it has a free trial.
- Only GMass lists a web app.
- Yesware also covers templates, booking links and reports.
- 1.8GPA
Mailshake
From $25/mo
Per-user cold email sequences with a dialer on the top plan.
- Mailshake also covers templates.
- 2.8GPA
Saleshandy
Free trial · from $34/mo
Cold email sequences with a B2B lead database in every plan.
- Only GMass lists a browser extension.
- Saleshandy also covers shared inbox.
- 2.6GPA
Instantly
Free trial · from $37.6/mo
Cold email from unlimited inboxes, priced by emails and contacts.
- Only GMass lists a browser extension.
- Instantly also covers workflow automation and AI agents.
Part 06 · Questions
Quick answers
The questions people ask about it, each answered in a line or two
15
Questions, each answered in a line or two
The short version of everything above, for when you only need the answer. Each one is told in full in its part of the guide.
Is GMass free?
No, GMass is a paid product, but you can try it first. 7-day free trial limited to 50 emails per 24 hours, no credit card required.
How much does GMass cost?
GMass lists 4 plans. Standard: $20 per account / month, billed annually ($29.95 billed monthly).
What platforms does GMass work on?
GMass is available on Web. It also has a browser extension.
Does GMass offer any discounts?
GMass publicly lists the following: Save up to 31% with annual billing; 15% off for .edu Google Workspace accounts; 15% off for .org Google Workspace accounts.
Does GMass have an Android app?
No Android app was listed when its pages were read on Oct 17, 2026. GMass is listed for Web.
Does GMass have an iPhone app?
No iPhone app was listed when its pages were read on Oct 17, 2026. GMass is listed for Web.
Is GMass open source?
GMass is not described as open source on its own site, as read on Oct 17, 2026.
Does GMass have an API?
Yes. GMass offers a public API, according to its own site.
What does GMass integrate with?
GMass's listing names Gmail, Google Sheets and Zapier. A listing names up to eight integrations, so it may connect to more.
Does GMass have a student discount?
15% off for .edu Google Workspace accounts. GMass's pricing FAQ says Google Workspace users on a .edu domain get 15% off the published prices, applied automatically after subscribing.
Who makes GMass?
GMass is made by GMass, Inc.
What are the alternatives to GMass?
The closest alternatives to GMass in our directory are Mixmax, Yesware, Mailshake, Saleshandy and Instantly.
How does GMass compare with other cold outreach tools?
GMass's GPA of 2.4 is higher than 11 of the 20 other cold outreach tools we grade, and level with 1.
Is GMass good value for money?
ToolGPA grades GMass B for value for money. Its paid plans start at $20 a month, against a middle price of $38.80 for the category: 1 of the 17 others that charge start lower.
Could I make my own version of GMass?
To replace GMass you would be making newsletters sent to thousands of people that still reach the inbox.
Where this guide comes from
The prices, plans, platforms and features were read from GMass’s own pages on Oct 17, 2026, and the grades were given on Oct 17, 2026. Graded from this listing, whose facts were read from GMass's own pages on 17 October 2026. Not based on using the product, and shorter than our full reviews.
Every tool we list gets five grades, A to F, each with its reason, and a GPA that averages them. How each is decided is at toolgpa.com/grades. This guide is ToolGPA’s own work; it is not made, paid for or approved by GMass, Inc. Prices change, so check gmass.co before you buy.
Part 07 · About
About ToolGPA
Who made this guide, what else is on the site, and how to cite it
1,880
Tools graded, in 47 categories
ToolGPA grades software the way a school report grades a pupil: five subjects, a letter for each with the reason written beside it, and a GPA that averages them. Prices, plans and platforms are read from each maker’s own pages and dated, so you always know how fresh a figure is.
ToolGPA is free to read. It may earn a commission from affiliate links and it works with sponsors, but anything paid for is labelled and no one can pay for a grade. Every tool on the site has a guide like this one, free to download and pass on. It all lives at toolgpa.com.
1,880
tools graded
47
categories
426
price changes on record
579
apps priced in 12 countries
What else is on toolgpa.com
- GMass, kept up to dateEverything in this guide, with prices and grades as they are todaytoolgpa.com/tools/gmass
- How grades are givenThe rules behind every letter and every GPAtoolgpa.com/grades
- Value chartsWhat each tool costs against what it scores, for every categorytoolgpa.com/charts
- CompareAny two tools side by side, plan by plantoolgpa.com/compare
- Price changesEvery price rise and cut on record, each with its sourcetoolgpa.com/price-changes
- Prices by countryWhat apps cost on the App Store in 12 countriestoolgpa.com/prices-by-country
- Pay lessEvery public discount: yearly billing, students, nonprofitstoolgpa.com/save
- Keep or makeWhich tools are worth paying for, and which you could build yourselftoolgpa.com/keep-or-make
Scan for the live page
Prices and grades as they are today
Quoting this guide?
Please name ToolGPA and link to the live page, so readers can check the figures for themselves:
ToolGPA, "GMass: The Insider's Guide", checked Oct 17, 2026. https://toolgpa.com/tools/gmass
Know someone choosing between cold outreach tools?
Send them this guide: toolgpa.com/tools/gmass/guide
ToolGPA elsewhere: youtube.com/@toolgpa
See our other guides
The best-graded cold outreach tools after GMass, each with an Insider's Guide of its own.
- Cold Outreach Insider's GuideEvery one of the 21 cold outreach tools we grade, compared
- lemlist Insider's GuideCold email and LinkedIn sequences with a built-in lead database2.8 GPA
- Salesforge Insider's GuideCold email and LinkedIn sequences with AI-written messages2.8 GPA
- Saleshandy Insider's GuideCold email sequences with a B2B lead database in every plan2.8 GPA
Choosing software? Every tool graded, every price dated.
Compare tools at toolgpa.com ›Everything in this guide is ToolGPA’s own summary of what GMass’s pages, its app-store listings and public reviews said on the dates shown. Grades are our judgement under the rules at toolgpa.com/grades. ToolGPA uses affiliate links and may earn a commission from them, and it works with sponsors; anything paid for is labelled, and no one can pay for a grade. GMass is a trademark of its owner, and this guide is not made, paid for or approved by GMass, Inc. Prices and plans change: check gmass.co before you buy.